Method of making fibrids from thermoplastics

Details Method of making fibrids from thermoplastics Method of making fibrids from thermoplastics

1984-03-09

1987-02-10

Anderson, Philip

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

55528, 264 12, 264115, 428359, B29B 900, D04H 154

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active

046422625

ABSTRACT:
Disclosed is a method of making fibrids from thermoplastics synthetics and copolymers thereof by expanding by vaporization, in the presence of a gaseous propellant, a polymer solution under elevated pressure and elevated temperature in a mixing nozzle under shear inducing conditions wherein the true or apparent solution of the polymer in solvent is expanded by the use of superheated steam having an average energy density of at least 50 watt-seconds per cubic centimeter in the mixing nozzle.

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patent: 4025593 (1977-05-01), Raganato et al.
patent: 4143196 (1979-03-01), Simm et al.
patent: 4167548 (1979-09-01), Arduini et al.
patent: 4189455 (1980-02-01), Raganato et al.
patent: 4211737 (1980-07-01), Di Drusco et al.

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